Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 134, NWS Twin Cities, MN

July 10, 20118 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 10, 2011, 10:09 PM CDT for 8 counties in Minnesota. It was in force for 66 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 10, 2011, 10:09 PM CDT (03:09 UTC)
Expired: Jul 10, 2011, 11:15 PM CDT
In force: 66 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Blue Earth County, MN, Brown County, MN, Le Sueur County, MN, McLeod County, MN, Nicollet County, MN, Scott County, MN, Sibley County, MN, Watonwan County, MN

The radar

The Minneapolis radar (KMPX), 70 km from the middle of the area, began a volume at 03:10 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jul 10, 10:27 PM CDT	TSTM WND GST 49	Madelia, MN	MNDOT HIGHWAY 60 MILE POST 60
Jul 10, 10:42 PM CDT	TSTM WND DMG	1 Sw Henderson, MN	NUMEROUS POWERLINES DOWN THROUGHOUT THE COUNTY. A LARGE TREE DOWNED 1SW HENDERSON.
Jul 10, 11:00 PM CDT	TSTM WND DMG	Le Sueur, MN	TREES AND POWER LINES DOWN. SOME BUILDING DAMAGE.
Jul 10, 11:08 PM CDT	TSTM WND DMG	Le Sueur, MN	SEVERAL TWELVE INCH DIAMETER TREES DOWNED. OCCURRED IN DIFFERENT PARTS OF TOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 10, 6:12 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 3.2 hours before the alert went out and 68 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1401 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 1316 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

904 
WUUS53 KMPX 110309
SVRMPX
MNC013-015-079-085-103-139-143-165-110415-
/O.NEW.KMPX.SV.W.0134.110711T0309Z-110711T0415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1009 PM CDT SUN JUL 10 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BLUE EARTH COUNTY IN SOUTH CENTRAL MINNESOTA...
  EASTERN BROWN COUNTY IN SOUTH CENTRAL MINNESOTA...
  WESTERN LE SUEUR COUNTY IN SOUTH CENTRAL MINNESOTA...
  SOUTHWESTERN MCLEOD COUNTY IN CENTRAL MINNESOTA...
  NICOLLET COUNTY IN SOUTH CENTRAL MINNESOTA...
  SOUTHWESTERN SCOTT COUNTY IN EAST CENTRAL MINNESOTA...
  SIBLEY COUNTY IN CENTRAL MINNESOTA...
  NORTHEASTERN WATONWAN COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 1115 PM CDT

* AT 1005 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THESE
  STORMS WERE LOCATED ALONG A LINE EXTENDING FROM BISCAY TO 5 MILES
  WEST OF LA SALLE...AND MOVING EAST AT 45 MPH.  PENNY SIZE HAIL MAY
  ALSO ACCOMPANY THESE DAMAGING WINDS.


LOCATIONS IN THE WARNING INCLUDE...
  NEW ULM...
  GAYLORD...
  LE SUEUR...
  ST PETER...
  MANKATO...
  ST GEORGE...
  GIBBON...
  SLEEPY EYE...
  WINTHROP...
  LAFAYETTE...
  KLOSSNER...
  NEW AUBURN...
  LA SALLE...
  HANSKA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE WINDS...WHICH CAN UPROOT
TREES...DOWN POWER LINES...AND CAUSE DAMAGE TO ROOFS AND WINDOWS.
EVACUATE MOBILE HOMES AS THEY MAY BE OVERTURNED. HAIL IS ALSO
EXPECTED...WHICH CAN CAUSE MINOR DAMAGE TO VEHICLES AND WINDOWS. SEEK
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

REPORT ANY SIGNIFICANT WIND OR HAIL DAMAGE TO THE NEAREST LAW
ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 4409 9483 4446 9474 4446 9462 4455 9463
      4472 9442 4472 9389 4468 9388 4468 9377
      4463 9376 4464 9374 4455 9376 4385 9378
      4385 9436
TIME...MOT...LOC 0308Z 286DEG 40KT 4477 9424 4409 9463
WIND...HAIL 70MPH 0.75IN

$$

3 follow-up statements

234 
WWUS53 KMPX 110335
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1035 PM CDT SUN JUL 10 2011

MNC013-015-079-085-103-139-143-165-110415-
/O.CON.KMPX.SV.W.0134.000000T0000Z-110711T0415Z/
BROWN MN-LE SUEUR MN-MCLEOD MN-NICOLLET MN-SCOTT MN-SIBLEY MN-
WATONWAN MN-BLUE EARTH MN-
1035 PM CDT SUN JUL 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR BLUE EARTH...
NORTHEASTERN WATONWAN...SIBLEY...SOUTHWESTERN SCOTT...NICOLLET...
SOUTH CENTRAL MCLEOD...WESTERN LE SUEUR AND EASTERN BROWN COUNTIES
UNTIL 1115 PM CDT...

AT 1033 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS
OF 70 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
GREEN ISLE TO LEWISVILLE...MOVING EAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  LE SUEUR...ST PETER...MANKATO...GREEN ISLE...NICOLLET...RUSH
  RIVER...NORSELAND...HENDERSON...VERNON CENTER...NORTH MANKATO...
  KASOTA...AMBOY...BELLE PLAINE...GOOD THUNDER AND CLEVELAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THESE
STORMS...PREPARE IMMEDIATELY FOR DESTRUCTIVE WINDS...WHICH CAN UPROOT
TREES...DOWN POWER LINES...AND CAUSE DAMAGE TO WINDOWS. EVACUATE
MOBILE HOMES AS THEY MAY BE OVERTURNED. SEEK SHELTER NOW INSIDE A
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

SEVERAL OF THESE STORMS HAVE EXHIBITED SOME WEAK ROTATION. TORNADOES 
CAN DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT 
IMMEDIATELY LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE 
TO A PLACE OF SAFETY INSIDE A STURDY STRUCTURE... SUCH AS A BASEMENT 
OR SMALL INTERIOR ROOM.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.

&&

LAT...LON 4405 9473 4446 9454 4472 9439 4472 9389
      4468 9388 4467 9377 4463 9375 4464 9374
      4455 9376 4385 9378 4385 9436
TIME...MOT...LOC 0335Z 286DEG 40KT 4469 9401 4396 9440
WIND...HAIL 70MPH <.75IN

$$

710 
WWUS53 KMPX 110345
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1045 PM CDT SUN JUL 10 2011

MNC085-110400-
/O.CAN.KMPX.SV.W.0134.000000T0000Z-110711T0415Z/
MCLEOD MN-
1045 PM CDT SUN JUL 10 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL MCLEOD COUNTY IS
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.

LAT...LON 4397 9458 4458 9425 4472 9425 4472 9389
      4468 9388 4467 9377 4462 9374 4385 9378
      4385 9436
TIME...MOT...LOC 0345Z 286DEG 40KT 4465 9386 4393 9426

$$

MNC013-015-079-103-139-143-165-110415-
/O.CON.KMPX.SV.W.0134.000000T0000Z-110711T0415Z/
BROWN MN-LE SUEUR MN-NICOLLET MN-SCOTT MN-SIBLEY MN-WATONWAN MN-
BLUE EARTH MN-
1045 PM CDT SUN JUL 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR BLUE EARTH...
EASTERN WATONWAN...EASTERN SIBLEY...SOUTHWESTERN SCOTT...NICOLLET...
WESTERN LE SUEUR AND SOUTHEASTERN BROWN COUNTIES UNTIL 1115 PM CDT...

AT 1042 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS
OF 70 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 5
MILES EAST OF GREEN ISLE TO 7 MILES EAST OF LEWISVILLE...MOVING EAST
AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  LE SUEUR...ST PETER...MANKATO...VERNON CENTER...NORTH MANKATO...
  KASOTA...BELLE PLAINE...AMBOY...GOOD THUNDER...CLEVELAND...ST
  HENRY...EAGLE LAKE...MAPLETON...ST CLAIR AND PEMBERTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE WINDS...WHICH CAN UPROOT
TREES...DOWN POWER LINES...AND CAUSE DAMAGE TO WINDOWS. EVACUATE
MOBILE HOMES AS THEY MAY BE OVERTURNED. SEEK SHELTER NOW INSIDE A
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

SEVERAL OF THESE STORMS HAVE EXHIBITED SOME WEAK ROTATION. TORNADOES 
CAN DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT 
IMMEDIATELY LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE 
TO A PLACE OF SAFETY INSIDE A STURDY STRUCTURE... SUCH AS A BASEMENT 
OR SMALL INTERIOR ROOM.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.

&&

LAT...LON 4397 9458 4458 9425 4472 9425 4472 9389
      4468 9388 4467 9377 4462 9374 4385 9378
      4385 9436
TIME...MOT...LOC 0345Z 286DEG 40KT 4465 9386 4393 9426
WIND...HAIL 70MPH <.75IN

$$

045 
WWUS53 KMPX 110358
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1058 PM CDT SUN JUL 10 2011

MNC015-165-110413-
/O.CAN.KMPX.SV.W.0134.000000T0000Z-110711T0415Z/
BROWN MN-WATONWAN MN-
1058 PM CDT SUN JUL 10 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WATONWAN AND
SOUTHEASTERN BROWN COUNTIES IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.

LAT...LON 4386 9436 4438 9412 4472 9404 4472 9389
      4468 9388 4467 9377 4464 9376 4462 9374
      4385 9378
TIME...MOT...LOC 0358Z 285DEG 41KT 4464 9382 4385 9406

$$

MNC013-079-103-139-143-110415-
/O.CON.KMPX.SV.W.0134.000000T0000Z-110711T0415Z/
LE SUEUR MN-NICOLLET MN-SCOTT MN-SIBLEY MN-BLUE EARTH MN-
1058 PM CDT SUN JUL 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR BLUE EARTH...
EASTERN SIBLEY...SOUTHWESTERN SCOTT...EASTERN NICOLLET AND WESTERN LE
SUEUR COUNTIES UNTIL 1115 PM CDT...

AT 1056 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM BELLE
PLAINE TO AMBOY...MOVING EAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  BELLE PLAINE...CLEVELAND...MAPLETON...EAGLE LAKE...ST HENRY...ST
  CLAIR...PEMBERTON...ST THOMAS AND MADISON LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...LARGE HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.

A FEW OF THESE STORMS HAVE EXHIBITED SOME WEAK ROTATION. TORNADOES 
CAN DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT 
IMMEDIATELY LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE 
TO A PLACE OF SAFETY INSIDE A STURDY STRUCTURE... SUCH AS A BASEMENT 
OR SMALL INTERIOR ROOM.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.

&&

LAT...LON 4386 9436 4438 9412 4472 9404 4472 9389
      4468 9388 4467 9377 4464 9376 4462 9374
      4385 9378
TIME...MOT...LOC 0358Z 285DEG 41KT 4464 9382 4385 9406
WIND...HAIL 60MPH <.75IN

$$

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 10, 7:13 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle, Stevens, Swift	62 min
Jul 10, 7:25 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Lac qui Parle, Pope, Renville, Swift and 1 more	50 min
Jul 10, 7:36 PM CDT	Tornado Warning	MPX	Kandiyohi, Pope, Stearns	39 min
Jul 10, 7:40 PM CDT	Tornado Warning	MPX	Lac qui Parle	35 min
Jul 10, 7:42 PM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope, Stearns, Todd	63 min
Jul 10, 7:48 PM CDT	Severe Thunderstorm Warning	MPX	Yellow Medicine	57 min
Jul 10, 7:57 PM CDT	Tornado Warning	MPX	Swift	33 min
Jul 10, 8:04 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Lac qui Parle, Renville, Yellow Medicine	56 min
Jul 10, 8:11 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker, Stearns	64 min
Jul 10, 8:24 PM CDT	Areal Flood Advisory	MPX	Benton, Douglas, Kandiyohi, Morrison, Pope, Sherburne and 3 more	3 hr
Jul 10, 8:29 PM CDT	Severe Thunderstorm Warning	MPX	Morrison	46 min
Jul 10, 8:36 PM CDT	Tornado Warning	MPX	Kandiyohi, Meeker	24 min
Jul 10, 8:40 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Redwood, Renville, Yellow Medicine	65 min
Jul 10, 8:45 PM CDT	Severe Thunderstorm Warning	MPX	Stearns	30 min
Jul 10, 8:52 PM CDT	Tornado Warning	MPX	Chippewa, Renville	38 min
Jul 10, 9:06 PM CDT	Severe Thunderstorm Warning	MPX	Meeker, Sherburne, Stearns, Wright	54 min
Jul 10, 9:20 PM CDT	Severe Thunderstorm Warning	MPX	Brown, McLeod, Nicollet, Redwood, Renville, Sibley	55 min
Jul 10, 9:30 PM CDT	Special Weather Statement	MPX	Blue Earth, Faribault, Freeborn, Le Sueur, Martin, Rice and 3 more	75 min
Jul 10, 9:33 PM CDT	Special Weather Statement	MPX	Benton	42 min
Jul 10, 9:37 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Carver, Hennepin, Sherburne, Wright	53 min
Jul 10, 9:46 PM CDT	Special Weather Statement	MPX	Dakota, Ramsey, Scott, Washington	74 min
Jul 10, 10:10 PM CDT	Tornado Warning	MPX	McLeod, Sibley	23 min
Jul 10, 10:17 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago, Dakota, Hennepin, Ramsey, Washington	58 min
Jul 10, 10:48 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Carver, Le Sueur, Rice, Scott, Steele and 1 more	57 min
Jul 10, 11:02 PM CDT	Special Weather Statement	MPX	Faribault, Freeborn, Martin	58 min
Jul 10, 11:13 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue, Rice, Steele	47 min
Jul 10, 11:39 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue	51 min
Jul 11, 1:34 AM CDT	Special Weather Statement	MPX	Faribault, Martin	56 min
Jul 11, 2:11 AM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn	64 min
Jul 11, 3:20 AM CDT	Areal Flood Advisory	MPX	Martin	3 hr

Nearby

Severe Thunderstorm Warnings in Minnesota, 2011 Every severe thunderstorm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.